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<p>This study investigates the influence of deformation temperature on the microstructural evolution and mechanical performance of a dual-phase high-entropy alloy subjected to cold rolling after annealing at 750 °C for 30 min. Unlike the homogenized alloy, which exhibits a single-phase face-centered cubic structure, the processed condition develops a dual-phase microstructure with the inclusion of body-centered cubic phases. Uniaxial tensile experiments were conducted across a wide temperature range to evaluate the mechanical response. These results were correlated with microstructural observations to elucidate the underlying deformation mechanisms and guide property optimization. While the coarse-grained homogenized condition exhibited no phase transformation during deformation, the refined dual-phase structure demonstrated strain-induced phase transformation with its extent strongly dependent on the deformation temperature. Notably, the microstructure obtained after thermomechanical processing demonstrated enhanced transformation-induced plasticity effect at lower temperatures, achieving a tensile strength exceeding 1600 MPa and a failure elongation of approximately 18% under cryogenic conditions.</p> Graphical Abstract <p></p>

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On the Enhanced Cryogenic Strength of a Dual-Phase TRIP-Assisted High Entropy Alloy

  • 期刊论文

  • 发表日期：

    2025年11月22日

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  • Yashar M. Sardroudi,
  • Amin Radi,
  • Farahnaz Haftlang,
  • Hyoung Seop Kim,
  • Guney Guven Yapici

摘要

This study investigates the influence of deformation temperature on the microstructural evolution and mechanical performance of a dual-phase high-entropy alloy subjected to cold rolling after annealing at 750 °C for 30 min. Unlike the homogenized alloy, which exhibits a single-phase face-centered cubic structure, the processed condition develops a dual-phase microstructure with the inclusion of body-centered cubic phases. Uniaxial tensile experiments were conducted across a wide temperature range to evaluate the mechanical response. These results were correlated with microstructural observations to elucidate the underlying deformation mechanisms and guide property optimization. While the coarse-grained homogenized condition exhibited no phase transformation during deformation, the refined dual-phase structure demonstrated strain-induced phase transformation with its extent strongly dependent on the deformation temperature. Notably, the microstructure obtained after thermomechanical processing demonstrated enhanced transformation-induced plasticity effect at lower temperatures, achieving a tensile strength exceeding 1600 MPa and a failure elongation of approximately 18% under cryogenic conditions.

Graphical Abstract